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Maleic anhydride grafted polycarboxylic acid type ultra-high-performance water reducing agent
The invention relates to a maleic anhydride grafted polycarboxylic acid type ultra-high performance water reducing agent which is prepared by the following steps: weighing 1000 parts of polyethylene glycol 1200, dissolving in a water bath, adding the above into a reaction kettle, simultaneously adding 900-1100 parts of methacrylic acid, 6-8 parts of hydroquinone and 1-2 parts of copper naphthenate, heating to 90-100 DEG C, adding 50-80 parts of concentrated sulfuric acid, continuously heating to 120 DEG C, keeping for 3-4 hours, then filling nitrogen for 1-2 hours to finish the reaction, and obtaining polyethylene glycol monomethacrylate. According to the invention, reaction is simple and sufficient, the flow is constant, and the production cost and the environmental pollution are reduced; and the produced maleic anhydride grafted polycarboxylic acid type ultra-high-performance water reducing agent is good in neat paste fluidity, good in slump loss resistance and very convenient to use.
一种马来酸酐接枝聚羧酸系超高性能减水剂，计量聚乙二醇1200料1000份，将其在水浴中溶化，加入反应釜内，同时加入甲基丙烯酸900—1100份，对苯二酚6—8份、环烷酸铜1—2份，升温至90—100℃，加入浓硫酸50—80份，继续升温至120℃，保持3—4小时，后充氮气1—2小时，反应完成，得到聚乙二醇单甲基丙烯酸酯；本发明具有反应简单、充分、流量恒定、减少了生产成本和环境的污染。生产的马来酸酐接枝聚羧酸系超高性能减水剂净浆流动度好，保坍性能好，使用非常方便。
Maleic anhydride grafted polycarboxylic acid type ultra-high-performance water reducing agent
The invention relates to a maleic anhydride grafted polycarboxylic acid type ultra-high performance water reducing agent which is prepared by the following steps: weighing 1000 parts of polyethylene glycol 1200, dissolving in a water bath, adding the above into a reaction kettle, simultaneously adding 900-1100 parts of methacrylic acid, 6-8 parts of hydroquinone and 1-2 parts of copper naphthenate, heating to 90-100 DEG C, adding 50-80 parts of concentrated sulfuric acid, continuously heating to 120 DEG C, keeping for 3-4 hours, then filling nitrogen for 1-2 hours to finish the reaction, and obtaining polyethylene glycol monomethacrylate. According to the invention, reaction is simple and sufficient, the flow is constant, and the production cost and the environmental pollution are reduced; and the produced maleic anhydride grafted polycarboxylic acid type ultra-high-performance water reducing agent is good in neat paste fluidity, good in slump loss resistance and very convenient to use.
一种马来酸酐接枝聚羧酸系超高性能减水剂，计量聚乙二醇1200料1000份，将其在水浴中溶化，加入反应釜内，同时加入甲基丙烯酸900—1100份，对苯二酚6—8份、环烷酸铜1—2份，升温至90—100℃，加入浓硫酸50—80份，继续升温至120℃，保持3—4小时，后充氮气1—2小时，反应完成，得到聚乙二醇单甲基丙烯酸酯；本发明具有反应简单、充分、流量恒定、减少了生产成本和环境的污染。生产的马来酸酐接枝聚羧酸系超高性能减水剂净浆流动度好，保坍性能好，使用非常方便。
Maleic anhydride grafted polycarboxylic acid type ultra-high-performance water reducing agent
一种马来酸酐接枝聚羧酸系超高性能减水剂
LYU DANPING (Autor:in) / HU QUAN (Autor:in) / LYU LU (Autor:in)
27.08.2021
Patent
Elektronische Ressource
Chinesisch
| Europäisches Patentamt | 2020
Polycarboxylic acid water reducing agent containing maleic anhydride and preparation method thereof
| Europäisches Patentamt | 2021
| Europäisches Patentamt | 2021
| Europäisches Patentamt | 2020